-Is the Epson 3000 worth the extra money over the Epson 2000? I don't see much difference in features.-

There aren’t any major feature differences, except for the ink sets. It is more what they are designed for. The r2000 is really aimed at color prints on photo papers, the r3000 will do that too but is much better than the r2000 on fine art papers and for black and white printing.